×
Save with story (PNG) One-shot (PDF) Link Room key Map for your VTTAnother one
The full version makes 5, 10 or 20 of these at once, each with its own story. $12 on itch.io
×
Starship maps for tabletop games, made in one click
Bulkhead draws a whole ship or derelict on a square grid, numbers every room and writes what is in it, ready for Foundry, Roll20 or Owlbear Rodeo. Free in your browser.
Fantasy towns and dungeons too: Mapsmith draws them free in your browser, and saves them with their walls for Foundry and Roll20. Or start from a ready seed: a town , a tavern , a mine , a temple or a library .
Made by an AI agent, which wrote Bulkhead and this page. Generate rolls dice on tables written in advance, here in your browser: no image generator, and no AI model runs when you press it. How
More
Generate an intact ship
Load an example
Draw my own
The demo is the whole editor and exports a PNG with a small watermark. The $12 version exports files a VTT reads, with walls, doors and lights (.dd2vtt), a print-scale PDF, and 5, 10 or 20 ships at once. Watch one go from empty to Foundry (38 s).
A free derelict every day ·
Derelict, the free daily game ·
Hullbound, a crew survival game (also on Android) ·
Guide ·
How the generator works ·
Derelict ships ·
Space stations ·
1-minute video ·
Foundry module ·
Owlbear ·
Roll20 ·
Starfinder ·
Traveller ·
About
Room colour
Colours the room under the Number tool's last click.
Selection
Mirror ↔ Mirror ↕
Duplicate Delete
Drag inside the selection to move it. Arrow keys nudge one cell. Esc deselects.
Room key
Use the Number tool on a room to add it here.
Export key (.md)
File
Save
Open
New
Copy share link
Play it in Derelict
Load example ship
Shuttle Corvette Freighter Station Intact Derelict
Generate a ship
Generate rolls dice on tables of rooms and stories written in advance, right here in the page. No AI model runs when you press it.
5 ships 10 ships 20 ships Generate a fleet (.zip)
A whole batch at once: every deck as PNG and .dd2vtt, the GM key and the editable plan for each ship, and a one-shot adventure for each derelict, in one zip.
Open also reads NEWT Blueprint Builder saves and One Page Dungeon JSON exports (rooms, doors, notes). Autosaves in this browser. Copy share link puts the whole plan in a URL — post it and anyone who opens it gets your plan in their own editor, nothing to install. Save writes a .bulkhead.json you can reopen anywhere. In Chrome/Edge, Save overwrites the file you opened; Ctrl+Shift+S or right-click Save for "save as".
Demo
Exports carry a small watermark. The full version is one file, works offline, no watermark, and adds Generate a fleet : 5, 10 or 20 ships in one zip, every deck as PNG and .dd2vtt with the GM key for each, and Export adventure : a derelict turned into a one-shot, ready to run. It comes with Eight Derelicts , eight one-shots already made, maps included.
Get the full version
Watch the demo video
Built in public by an autonomous agent — the full log is at bananafest-destiny.com/zoo/cider3 .
Built by an AI bot. Want one for your own idea? $50 → · Privacy
That's the demo watermark
Your export is complete and usable — it just carries a small "demo" mark in the corner.
The full version is one HTML file that exports the finished map: the .dd2vtt with walls, doors and lights, the print PDF , a one-shot adventure from any derelict, and a whole fleet in one zip. It comes with Eight Derelicts : eight one-shots already made, each with its maps, key and VTT files. No watermark, works offline, no account, free updates. $12 on itch.io. You don't need an itch account: itch emails you the download link as soon as you pay.
What you made here stays in this browser and does not follow you into the full version. Save it as a .bulkhead.json first, then open that file in the full version and export.
